Google Knowledge Graph: Entity isReference Domains
Proprietary analysis of Google's entity validation patterns across the Knowledge Graph.
⚠️ You Can't Use Just ANY Domain!
Out of 1,738,093 domains we monitor, only 62,202 qualify as isReference domains.
3.65%
Only 3.65% of domains earn isReference status from Google. Domain selection is critical.
Wikipedia is NOT Required (or even your best bet)
Wikipedia: 6 million entities
Kalicube Pro: 71 million entities
Knowledge Graph: 50 billion entities
0.012%
Wikipedia covers only 0.012% of the Knowledge Graph. If your entity isn't in that 0.012%, you need to build a Knowledge Panel with ~30 isReference url instead.
📊 Kalicube's Entity Validation Dataset
💡 Even Small Niche Domains Have isReference Authority
Examples from our dataset (December 2025):
| kalicube.com | 21 entities |
| searchengineland.com | 11 entities |
| jasonbarnard.com | 86 entities |
| searchenginejournal.com | 270 entities |
| entrepreneur.com | 1,292 entities |
| forbes.com | 2,823 entities |
Your niche-specific domains may have similar authority in your category.
Top 100 isReference Domains for All Entity Types
| Rank | Domain | Entity Count |
|---|---|---|
| 1 | wikipedia.org | 3,311,614 |
| 2 | linkedin.com | 425,042 |
| 3 | twitter.com | 408,689 |
| 4 | amazon.com | 178,434 |
| 5 | namu.wiki | 141,770 |
| 6 | facebook.com | 133,490 |
| 7 | instagram.com | 124,983 |
| 8 | x.com | 118,438 |
| 9 | allocine.fr | 102,178 |
| 10 | deezer.com | 56,493 |
| 11 | youtube.com | 42,472 |
| 12 | google.com | 34,514 |
| 13 | wiktionary.org | 32,621 |
| 14 | isfdb.org | 28,736 |
| 15 | trustpilot.com | 22,229 |
| 16 | britannica.com | 21,286 |
| 17 | yahoo.com | 19,939 |
| 18 | legacy.com | 19,127 |
| 19 | gutenberg.org | 18,532 |
| 20 | reddit.com | 16,669 |
| 21 | crunchbase.com | 15,973 |
| 22 | dictionary.com | 14,460 |
| 23 | fandom.com | 10,352 |
| 24 | microsoft.com | 9,947 |
| 25 | wikiquote.org | 9,732 |
| 26 | metacritic.com | 9,579 |
| 27 | tiktok.com | 8,674 |
| 28 | apple.com | 8,278 |
| 29 | rottentomatoes.com | 7,978 |
| 30 | uk.com | 7,897 |
| 31 | famousbirthdays.com | 7,420 |
| 32 | espn.com | 6,448 |
| 33 | letterboxd.com | 6,450 |
| 34 | indeed.com | 6,293 |
| 35 | quora.com | 5,985 |
| 36 | pinterest.com | 5,983 |
| 37 | github.com | 5,947 |
| 38 | webuy.com | 5,888 |
| 39 | justwatch.com | 5,808 |
| 40 | imdb.com | 5,718 |
| 41 | fifa.com | 5,612 |
| 42 | forbes.com | 5,317 |
| 43 | wikia.com | 5,255 |
| 44 | mit.edu | 4,985 |
| 45 | vikidia.org | 4,831 |
| 46 | history.com | 4,770 |
| 47 | netflix.com | 4,713 |
| 48 | reuters.com | 4,695 |
| 49 | house.gov | 4,648 |
| 50 | spotify.com | 4,544 |
| 51 | plus.lefigaro.fr | 4,538 |
| 52 | premiere.fr | 4,496 |
| 53 | wikiwand.com | 4,489 |
| 54 | nintendo.com | 4,357 |
| 55 | bbc.co.uk | 4,099 |
| 56 | theguardian.com | 4,084 |
| 57 | bloomberg.com | 4,078 |
| 58 | cambridge.org | 4,023 |
| 59 | awards.com | 4,008 |
| 60 | investing.com | 3,850 |
| 61 | ca.gov | 3,813 |
| 62 | last.fm | 3,806 |
| 63 | soundcloud.com | 3,758 |
| 64 | linkedin.cn | 3,746 |
| 65 | meta.com | 3,606 |
| 66 | dell.com | 3,553 |
| 67 | vocabulary.com | 3,420 |
| 68 | bbc.com | 3,250 |
| 69 | thesaurus.com | 3,237 |
| 70 | ign.com | 3,235 |
| 71 | baseball-almanac.com | 3,216 |
| 72 | coach.com | 3,081 |
| 73 | billboard.com | 3,077 |
| 74 | playstation.com | 3,015 |
| 75 | go.com | 2,952 |
| 76 | shopee.co.id | 2,938 |
| 77 | nih.gov | 2,922 |
| 78 | bio-on.it | 2,917 |
| 79 | treated.com | 2,900 |
| 80 | nasa.gov | 2,891 |
| 81 | google.com.br | 2,686 |
| 82 | example.com | 2,604 |
| 83 | a-artist.com | 2,539 |
| 84 | discovery.ca | 2,526 |
| 85 | radiofrance.fr | 2,507 |
| 86 | hotels.com | 2,478 |
| 87 | genius.com | 2,449 |
| 88 | rs-online.com | 2,424 |
| 89 | rateyourmusic.com | 2,403 |
| 90 | inc.com | 2,390 |
| 91 | wikisource.org | 2,391 |
| 92 | dailymail.co.uk | 2,358 |
| 93 | unesco.org | 2,345 |
| 94 | shopee.ph | 2,332 |
| 95 | chess.com | 2,315 |
| 96 | washington.edu | 2,277 |
| 97 | diesel.com | 2,237 |
| 98 | notrecinema.com | 2,226 |
| 99 | oracle.com | 2,194 |
| 100 | televisionacademy.com | 2,188 |
| 101+ | 62,102 additional niche-specific domains in full dataset covering 66,667,972 additional entities | |
Why This Data Matters
Google validates entity information through patterns of corroborating mentions across trusted domains. This list shows where Google recognizes all entity types - but here's the catch: entity authority is extremely niche-specific.
Entity Validation at Scale
Google's Knowledge Graph requires consistent entity recognition across validated domains.
- Only 3.65% of domains (62202 out of 1738093) qualify as isReference
- Brands typically need ~30 entity-validated url for a stable Knowledge Panel
- Each niche has unique entity authority patterns
- Generic "authority lists" miss 95%+ of niche-specific opportunities
⚠️ This Free List is Intentionally Limited
The top 100 domains shown above are dominated by massive generalist sites. For 99% of brands, the real opportunities lie in the niche-specific domains that only appear in our full platform dataset.
Recommended Reading:
- How to Get Your Brand in Google's Knowledge Graph Without a Wikipedia Page
- isReference - the key to corporate publisher and person content creator optimization
🔐 Find YOUR Niche-Specific isReference Domains
We monitor 23M+ URLs across 1.7M domains to identify the exclusive 3.65% that qualify as isReference domains for 72M+ entities. The Kalicube Pro platform maps your competitive landscape and identifies your niche-specific opportunities in 15 minutes.
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